Twenty-four years .

That 's how much time must pass before the prime suspect in the disappearance of American Natalee Holloway faces the American justice system .

Peru has agreed to extradite Joran van der Sloot to the United States , but only after he finishes serving a 28-year murder sentence , the Peruvian news agency Andina reported . The Peruvian court system sentenced him in 2012 , but he will be eligible for release in 2038 because of the time he already has spent in custody .

In the United States , he 's been indicted on federal charges of extortion and wire fraud . American authorities accuse him of extorting money from Holloway 's mother by offering bogus information about her daughter 's disappearance .

Holloway , an 18-year-old from Alabama , was last seen in the early hours of May 30 , 2005 , leaving a nightclub in Aruba with van der Sloot and two other men .

She 'd gone to the Caribbean island with 100 classmates to celebrate their graduation from Mountain Brook High School in suburban Birmingham , Alabama .

Holloway 's body has never been found , and she was declared legally dead in 2012 . Nobody has been charged in her disappearance .

The courts in Peru convicted van der Sloot in 2012 of murdering Stephany Flores , 21 , in his Lima hotel room . The judges gave him a sentence two years short of the 30-year maximum .

Investigators have said they believe van der Sloot , a 26-year-old Dutch national , killed Flores after she found something related to the Holloway case on his computer while visiting his hotel room .

Van der Sloot confessed to robbery in addition to murder , admitting that he stole Flores ' belongings , including more than $ 300 in local currency , credit cards and the victim 's van as a means to leave the country . He fled to Chile and was arrested a few days later .

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He 's a suspect in the 2005 disappearance of Natalee Holloway in Aruba

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Van der Sloot must first finish a 28-year murder sentence in Peru

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U.S. courts want to try him on extortion charges